Antisiphon self-scouring trap.



G. GODY. ANTISIPHON SELF soounme TRAP.

APPLICATION FILED HARM, 1910.

1,1 12,437. Patented Oct. 6, 1914.

2 SHEETS-SHEET 1.

Fig.1. I I g ATTORNEYS G. CODY. ANTISIPHON SELF SGOURING TRAP. APPLICATION FILED MAR. 24, 1.9.10.

1,1 12,437. Patented 001;. 6, 1914.

Fly- 3. 1 49.41 I "1 W WITNESSES: INVENTOR v George C ciy ATTORNEYS unrrnp STATES PATENT OFFICE.

GEORGE CODY, OF BROOKLYN, NEW YORK.

ANTISIiI-ION SELF-SCOURING T AP.

To all whom it may concern:

Be it known that I, GEORGE CODY, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Antisiphon Self-Securing Traps, of which the following is a specification.

This invention relates to sewer gasvtraps and is designed to produce a trap for use on the discharge pipes of wash basins, sinks, tubs and various kinds of plumbing apparatus, other than water closets, which will reestablish a water seal after any suction or siphonic action due to the flow of water through the main discharge pipe from upper floors of the building in which the apparatus is installed. Where a building has a number of sets of plumbing apparatus of the ordinary character installed on different floors and all connected to one discharge pipe leading to the sewer there is a tendency for every flow of water from the apparatus on one floor to produce a suction in the branches of pipe leading to each set of apparatus on the lower floors. This suction is often strong enough to pull air through the traps forming the seals for such branch connections on the lower floors and, unless the traps are properly designed, the air so sucked through will drive before it so much of the water standing in such lower traps that there will not be enough left to reestablish the seal in said lower traps after the suction ceases. This renders the whole system unsanitary and obnoxious to the regulations of the building and health departments of modern city governments. Such trap must also be free from various other objections in order to pass inspection and I have invented a trap to meet these requirements which is aiiti-Siphonic, in that the seal cannot be destroyed by siphonic or air sucking action, which is self scouring in flushing, i. e. is automatically cleaned by the ordinary gravity flowv of water therethrough, and which has no interior partitions extending above the 'level of the water left by a normal suction-produced flow of air through it.

The best form of trap at present known Specification of Letters Patent.

Patented 001:. 6.1914.

Application filed March 24, 1910. serial No. 551,381.

tome embodying my invention is illustrated in the accompan in which,

Figure 1 is a) sectional side elevation of the trap exposing its interior construction.

let leg or outflow branch. The inlet leg I) is wholly exterior to the body a and joins the same atone side of the trap near the ying two sheets of drawing 1 0 Throughout the drawings a like reference bottom, preferably forming a continuous] curvewith the bOttOIIlOf the trap. as shown.*

The inlet leg is-disposed in a substantially vertical-position, and its highest exterior point of juncture or connection with the body of the trap is below the level ofthe water left in thetrap after a normal suction-produced flow of air has passed through it. The leaving of a sufficient quantity of water in the trap toproduce this result is due to its internal configuration as shown a in the drawings. Thebottoin and that side of the trap body opposite to the inlet sweep' in a continuous curve upand b'aok'to the outlet connection to the outlet leg 0, meeting said outlet leg in a sharp horizontally extending cut off lip"e',.which has a curved lower face into which the wall line of the trap merges. The upper surface of the lip e slopes backwardtoward the trap body so that any water left in the-outlet leg when the suction ceases flowsback into thetrap body. In horizontal cross section, as shown in Fig. 2, the trap body is widest nearest the side of the trap body opposite the side at which the inlet and outlet are located. The

side of the trap body nearest which the inlet and outlet are situated has preferably a slight outwardcurve and the opposite side has a pronounced outward curve, all as showninFig. 1. Preferably there is a sharp downwardly extending lip cl at the juncture of the inlet leg and the main body of the trap, which forms a sharp, sealing, cut-off edge. The body of thetrap is also bulged the waste pipe of which it is connected is emptied, the current sweeps through the body of the trap from inlet to outlet, following naturally the curvature of the body withoutujneeting any obstructions to form eddies,--andcarrying with it all impurities automatically cleansing and scouring the trap, jWhen the liow ceases the water stands in, the position shown in Fig. 1, forming a tight seal. When there is a fiow of-water down the main sewer pipe (not shown) eXtending to an upper fiooror floors,

suction is produced in the outlet leg 0 which drzm sa portion of this water out through outlet leg 0, and when the level in the inlet leg b falls to the level of the cut-oil lip (Z, air is also sucked through. This air, however, being much lighter than the water, has less momentum, and, as it passesunder the lip, its buoyancy causes its course to be sharply deflected and it bubbles straight upward to outlet leg 0, along the slightly curved wall on the right side of the-trap (looking at l ig. 1). The water driven beforethe air, being much heavier, has. more momentum, passes straight 011 and; piles up against the opposite side where the trap is most capa'cious, or if any of it is 'carried all the way up along said opposite wall. by its momentum, it runs under the lip.@ and is thrown backward and downward thereby, tumbling over and over in the curvilinear shaped trap body without being drawnout of it. WV hen the suction and flow of air cease there is still enough water left inthe trap,after any normal flow of air therethrough, to drop back into the bottom of the trap and flow up into the inlet leg'cl, far enough to bring the water level considerably above. the highest exterior point of juncture of trap body and inlet leg, although not to as high a level as shownin Fig. 1. Any water left in the outlet leg 0 also runs back over the watershed forme'dzby the backwardly inclined upper surface of lip e as before explained, and is returned to'the trap. This feature of opera- :tion ,of the trap is due to the fact that the outlet orifice left by the lip e is much smaller. than the largest horizontal cross section of the trap (infact smaller than any such cross section) and is located all on one sideof any vertical plane dividing ti e trap body into two portions of equal capacity, the inlet orifice left bylip Z being also on this side of the trap. Consequently when the passing current of air travels directly from inlet to outlet, a suli'icient quantity of water left undisturbed by it on the other side of the trap to restore the normal water level, after siphoning, at a point above the high est exterior point of juncture between the trap body and inlet leg, that point of juncture beingv preferably placed much lower than the outlet orifice and nearer to the inlet than to the outlet. As a result a perfect gas seal is reestablished and the level of the water seal being above the interior lip d, and the upper portion of the water resting at every point against walls which are exposed to the outer air, any leakage through said walls which might be due to corrosion of the material, or imperfections in casting, becomes innnediately apparent, and leads to repair or replacement of an imperfect trap.

in other forms of trap where the seal is formed wholly by an interior partition, any such perforation above the water level in such interior partition would not be apparent on external inspection, and sewer gas could leak through above the water, the seal thereby being destroyed. lhis feature of construction and operation above described is one absolutely required by most sanitary 9 building laws, 2'. e. the seal must be formed by exteriorly exposed trap walls, or, to put it in other language, there must be air space entirely around both portions of the trap containing the water seal and above their highest point of exterior connection, so that any opening through which gas or .vater might pass may be discovered on in spection when the trap is in operation.

inother practical advantage of my inition is that the trap is of a shape such that it can be easily cast in one piece, the cores being easily removed, and the mold easily divided.

There are no pockets or corners in the trap interior in which solid matter can accumulate. Practically all dirt is swept out on each flushing of the trap, and any particularly heavy material which can not be so flushed out will deposit at the bottom of the trap, where it will drop out on removing the plug 72.

As above explained, an ample seal is secured at all times against any backward [low of sewer gas, and without the use of any heavy liquid such as mercury, which would form an obstruction to the normal low of water in flushing operations, besides being costly and unhealthy.

Having, therefore, described my invention, I claim:

1. An automatic anti-siphon self-scouring, trap having an inlet at the bottom, and a horizontally extending outflow connection from the top, the outer wall of the trap botinuously downward'from said junction, so

as to form a combined cut-ofi lip andreturn water shed when the trap is siphon- 5. An automatic anti-siphon self scouring trap consisting of a bulging curvilinear body, to which are joined an inlet leg and an outlet leg, a sharp sealing cut off edge in said trap formed at the juncture of the wall of the trap body and inlet leg, the body of the trap being bulged and of greater capacity at the point farthest from the inlet leg, and a sharp sealing cut off edge in the body of the trap at the outlet and below the level of the outflow from the outlet leg.

3. An automatic anti-siphon self-scouring trap having an inlet at the bottom, and a horizontally extending outflow connection from the top, the outer wall of the trap being extended inwardly at its junction with the outflow connection, and inclined continuously downward from said junction, so as to form a combined cut-oif lip and return water shed when the trap is siphoning, the body of the trap having its largest horizontal cross section near its bottom.

4. An automatic anti-siphon self-scouring trap having an inlet at the bottom, and

a horizontally extending outflow connection from the top, the outer wall of the trap being extended inwardly at its junction with the outflow connection, and inclined con tinuously downward from-said junction, so as to form a combined cut-0E lip and return water shed when the trap is siphoning, the body of the trap having its largest horizontal cross section near its bottom and being curvilinear in outline of intersection with planes of every angle of direction.

5. An automatic, anti-siphon, self scouring trap having its interior free from partitions or other obstructions to the flow of water, an outlet at the top and an inlet on one side at the bottom of the trap body, in combination with an exterior vertically disposed inlet leg connected to the trap body inlet, the highest exterior point of connection between the body and inlet leg being below the lowest normal level of water in said trap.

6. An automatic, antisiphon, self scouring trap having a trap body with an outlet at the top, the opening to which outlet is wholly on one side of a vertical plane dividing the body of the trap into two parts of equal capacity, in combination with an exterior vertically disposed inlet leg connected to the trap body at the bottom and on the same side as the outletopening, the highest exterior point of connection between the body and the inlet leg being below the level of the outlet.

7. An anti-siphon trap having a body formediof continuously curved walls, an outlet opening at the top of width and cross section much smaller than the greatest width and largest" horizontal interior cross section of the trap body, and located on one side thereof, in combination with an exterior vertically, disposed inlet leg connected to the trap body at the bottom thereof and on the same side as the outlet opening, the highest exterior point of connection between the body'and the inlet leg be ing nearer to the inlet than to the outlet.

8. An automatic, anti-siphon, self scouring trap having its interior free from partitions or other obstructions to the flow of water, an outlet at the top and an inlet on one side at the bottom of the trap body, in combination with an exterior vertically disposed inlet leg connected to the trap body inlet, the highest exterior point of connection between the body and the inlet leg being below the water line of the water left in the trap after a normal suction-produced flow of air through it, said inlet and outlet openings being on the same side of the trap body, and the trap body being widest in horizontal cross section near the other side.

with inlet and outlet openings at or near one side, the outlet being above the inlet, a downwardly extending lip over the inlet opening, and a backwardly and horizontally extending li with a curved lower face located at the out etopening, said trap body having its interior wall face opposite to the inlet openingshaped in a continuous curve which merges into the curved lower face of the outlet lip.

11. An automatic, anti-siphon, self scouring trap having its main body provided with an inlet at one side near the bottom, an outlet at the top nearest the same side, and an outwardly curved wall on the same side extending from the inlet up to the outlet.

12. An automatic, anti-siphon, self scouring trap having its main body provided with an inlet at one side near the bottom, an outlet at the top nearest the same side, and an outwardly curved wall on the same side extending from the inlet up to the outlet, the trap body having the widest portion of its horizontal cross section nearest the side opposite the inlet.

13. An automatic, anti-siphon, self scouring trap having its main body provided with an inlet at one side near the bottom,

9. An automatic, anti-siphon, self scouran outlet at the top nearest the same side, my hand in the presence of two subscribing and anoutwardly curved Wall on the same witnesses. side extending from the inlet up to the outlet, the bottom and other Wall of the GEORGE CODY 5. trap body forming a continuous curve out- Witnesses:

Ward and upward to the outlet. FRANCIS H. TARLAND, In testimony whereof I havehereunto set CHRISTIAN ALMSTAEDT.

Gopies'ofthis patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington, I). C. 

